Suppose It Were Possible to Lower a Yellow Sodium Lamp

Multiple Choice

Suppose it were possible to lower a yellow sodium lamp toward the event horizon of a black hole. What would an observer see while watching from a safe distance?

A) The brightness and color would each remain unchanged.
B) The light from the lamp would change to orange and then red.
C) The light would remain yellow, but there would be fewer and fewer photons being emitted from it.
D) The light from the lamp would change to green and then blue.